Projection Light Source Assembly for LED Color Bias Compensation

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Solution Overview

Problem

LED lighting instruments used in photography exhibit a color bias towards green or red, leading to lower color rendering indices and color distortion in captured images.

Innovation Solution

A light source system comprising a main and auxiliary light source assembly, with the auxiliary light containing blue and red light to compensate for chromatic aberrations, and a concentrating assembly to adjust the color rendering index to a preset value.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If LED light source is used in lighting instrument, then energy efficiency and longevity are improved, but color rendering index deteriorates due to green or red color bias

Engineering Contradiction:

Improveenergy efficiencyVSAvoidcolor rendering index

Core Design Contradiction:

Loss of energyVSManufacturing precision

Solution Approach 1:

The lighting instrument is divided into multiple independent light source assemblies: a main light source assembly (first LED chip) and at least one auxiliary light source assembly (second LED chip with different wavelength). This segmentation allows each assembly to contribute different spectral components, enabling the system to achieve both energy efficiency and improved color rendering index by combining their outputs.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent combines multiple LED chips with different wavelength characteristics (e.g., blue LED with yellow phosphor, red LED, green LED) to create a composite light source system. This composite approach merges the spectral advantages of different LED types to produce a balanced spectrum that maintains high energy efficiency while correcting color bias and improving color rendering index.

Inventive Principle:

Principle #40Composite materials

2Device complexity

If main light source assembly emits light with green or red bias, then device complexity is reduced, but color reproduction quality deteriorates

Engineering Contradiction:

Improvelight source structureVSAvoidcolor reproduction

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent adjusts the wavelength parameters of the LED chips by selecting different chip types (blue, red, green LEDs) and configuring their proportions. By changing the spectral parameters of the light sources and their relative intensities, the system corrects color bias and achieves accurate color reproduction while maintaining simple device structure.

Inventive Principle:

Principle #35Parameter changes

3Manufacturing precision

If auxiliary light source assembly with different wavelength is added, then color rendering index is improved, but device complexity increases

Engineering Contradiction:

Improvecolor rendering indexVSAvoidlight source structure

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent merges multiple LED light source assemblies with different wavelength characteristics into a single integrated lighting instrument. The main light source assembly and auxiliary light source assemblies are combined in one device, allowing them to work together to produce a balanced spectrum with high color rendering index while maintaining a unified and manageable device structure.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The auxiliary light source assembly serves multiple functions: it compensates for color bias, improves color rendering index, and enables accurate color reproduction. By making the auxiliary assembly multi-functional, the patent reduces the need for additional separate components, thereby improving color rendering without proportionally increasing device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system improves color reproduction by increasing the color rendering index from 10 to 95, reducing chromatic aberrations, and maintaining consistent color temperature.

Implementation Method 1

The concentrating assembly is arranged in an optical path of emergent light of the light source assembly, and is configured to concentrate the main light and the auxiliary light to obtain projection light

Methodology Applied

Scientific EffectOptical focusing: Focusing

Implementation Method 2

the filter device is configured for filtering green light or red light with a proportion within the first preset proportion range in the emergent light, to adjust the proportion of green or red light in the filtered light to the second preset proportion range

Methodology Applied

Scientific EffectOptical filtering: Filter (optical)

Data Source

PatentUS20260036280A1Light source system and lighting system

Publication Date: 2026.02.05 YLX INC

AI summary

The present disclosure discloses a light source system and a lighting system. The light source system includes a light source assembly and a concentrating assembly. The light source assembly includes a main light source assembly and an auxiliary light source assembly. The main light source assembly is configured to generate main light. The auxiliary light source assembly is configured to generate auxiliary light. When the main light source assembly satisfies a preset condition, a proportion of green light or red light in the main light is within a first preset proportion range. The auxiliary light includes blue light and red light. The concentrating assembly is arranged in an exit optical path of the light source assembly, and is configured to concentrate the main light and the auxiliary light to obtain projection light.